计算元素的数量。
size_type size();
备注
成员函数返回控件序列的长度。使用该当前定位元素数在控件序列。如果您关注的所有为序列是否具有非零大小,请参见 multimap::empty (STL/CLR)()。
示例
// cliext_multimap_size.cpp
// compile with: /clr
#include <cliext/map>
typedef cliext::multimap<wchar_t, int> Mymultimap;
int main()
{
Mymultimap c1;
c1.insert(Mymultimap::make_value(L'a', 1));
c1.insert(Mymultimap::make_value(L'b', 2));
c1.insert(Mymultimap::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Mymultimap::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
// clear the container and reinspect
c1.clear();
System::Console::WriteLine("size() = {0} after clearing", c1.size());
// add elements and clear again
c1.insert(Mymultimap::make_value(L'd', 4));
c1.insert(Mymultimap::make_value(L'e', 5));
System::Console::WriteLine("size() = {0} after adding 2", c1.size());
return (0);
}
要求
标题: <cliext/映射>
命名空间: cliext